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11.52.29 keycolumns
set keycolumns ( <value> | auto )
The setting keycolumns sets how many columns the legend of a plot should be arranged into. By default, the legends of plots are arranged into an automatically-selected number of columns, equivalent to the behaviour achieved by issuing the command set keycolumns auto. However, if a different arrangement is desired, the set keycolumns command can be followed by any positive integer to specify that the legend should be split into that number of columns, as in the example:
set keycolumns 3
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